The class PolyMatchStringKernel computes a variant of the polynomial kernel on strings of same length.
It is computed as
where I is the indicator function which evaluates to 1 if its argument is true and to 0 otherwise.
Note that additional normalisation is applied, i.e.
在文件PolyMatchStringKernel.h第36行定义。
公有成员 | |
CPolyMatchStringKernel (int32_t size, int32_t degree, bool inhomogene) | |
CPolyMatchStringKernel (CStringFeatures< char > *l, CStringFeatures< char > *r, int32_t degree, bool inhomogene) | |
virtual | ~CPolyMatchStringKernel () |
virtual bool | init (CFeatures *l, CFeatures *r) |
virtual void | cleanup () |
virtual EKernelType | get_kernel_type () |
virtual const char * | get_name () const |
保护成员 | |
virtual float64_t | compute (int32_t idx_a, int32_t idx_b) |
保护属性 | |
int32_t | degree |
bool | inhomogene |
CPolyMatchStringKernel | ( | int32_t | size, | |
int32_t | degree, | |||
bool | inhomogene | |||
) |
constructor
size | cache size | |
degree | degree | |
inhomogene | is inhomogeneous |
在文件PolyMatchStringKernel.cpp第20行定义。
CPolyMatchStringKernel | ( | CStringFeatures< char > * | l, | |
CStringFeatures< char > * | r, | |||
int32_t | degree, | |||
bool | inhomogene | |||
) |
constructor
l | features of left-hand side | |
r | features of right-hand side | |
degree | degree | |
inhomogene | is inhomogeneous |
在文件PolyMatchStringKernel.cpp第26行定义。
~CPolyMatchStringKernel | ( | ) | [virtual] |
在文件PolyMatchStringKernel.cpp第34行定义。
void cleanup | ( | ) | [virtual] |
float64_t compute | ( | int32_t | idx_a, | |
int32_t | idx_b | |||
) | [protected, virtual] |
compute kernel function for features a and b idx_{a,b} denote the index of the feature vectors in the corresponding feature object
idx_a | index a | |
idx_b | index b |
实现了CKernel。
在文件PolyMatchStringKernel.cpp第50行定义。
virtual EKernelType get_kernel_type | ( | ) | [virtual] |
return what type of kernel we are
实现了CKernel。
在文件PolyMatchStringKernel.h第75行定义。
virtual const char* get_name | ( | ) | const [virtual] |
initialize kernel
l | features of left-hand side | |
r | features of right-hand side |
在文件PolyMatchStringKernel.cpp第39行定义。
int32_t degree [protected] |
degree
在文件PolyMatchStringKernel.h第99行定义。
bool inhomogene [protected] |
if kernel is inhomogeneous
在文件PolyMatchStringKernel.h第101行定义。